7.下列各组数据能作为一个等腰三角形各边长的是( )
| A. | 1,1,2 | B. | 4,2,4 | C. | 2,3,4 | D. | 3,3,7 |
5.
如图,四边形ABCD是菱形,EC=2BE,则$\frac{BF}{FD}$的值是( )
| A. | $\frac{1}{2}$ | B. | $\frac{1}{3}$ | C. | $\frac{1}{4}$ | D. | $\frac{1}{5}$. |
4.-1.5的相反数是( )
| A. | 0 | B. | -1.5 | C. | 1.5 | D. | $\frac{2}{3}$ |
2.顺次连接正方形各边中点所得的四边形是( )
| A. | 等腰梯形 | B. | 正方形 | C. | 菱形 | D. | 矩形 |
1.如图所示,函数y=-x-2的图象大致是( )
| A. | B. | C. | D. |
19.下列图形一定相似的是( )
0 286714 286722 286728 286732 286738 286740 286744 286750 286752 286758 286764 286768 286770 286774 286780 286782 286788 286792 286794 286798 286800 286804 286806 286808 286809 286810 286812 286813 286814 286816 286818 286822 286824 286828 286830 286834 286840 286842 286848 286852 286854 286858 286864 286870 286872 286878 286882 286884 286890 286894 286900 286908 366461
| A. | 两个矩形 | B. | 两个正方形 | ||
| C. | 两个菱形 | D. | 对应边成比例的两个四边形 |